In USGBC's "Who can be a Cxa" document (, an independent company, not a member of the design team, can be contracted by the architect or engineer to do CxA. On a design-build team, the GC is a part of the design team as well. If the company is independent and not part of the design team, can the GC contract them in a design-build situation as long as the CxA reports everything to the owner?